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Svetllana [295]
3 years ago
7

Can you help me solve this?​

Mathematics
2 answers:
Natalka [10]3 years ago
6 0

Answer:

first one is rational, second is also rational, third is rational, fourth is rational, and fifth is irrational.

Step-by-step explanation:

Rational numbers are numbers that can be expressed as a fraction or part of a whole number. (examples: -7, 2/3, 3.75) Irrational numbers are numbers that cannot be expressed as a fraction or ratio of two integers. The reason why \sqrt{12} is an irrational number is bc it's not a perfect square while\sqrt{49} equals to 7 and is a perfect square.

Dahasolnce [82]3 years ago
5 0

Answer:

  1. rational
  2. irrational
  3. rational
  4. rational
  5. irrational

Step-by-step explanation:

<u>Numbers given</u>

6.(32)

  • This is repeat non-terminating number which can be expressed as a fraction, so it is rational

3.121121112...

  • this is non-repeat non-terminating number which can't be expressed as a fraction so it is irrational

√49 = 7

  • This is rational

-27/4

  • This is rational

√12 = 2√3

  • This is not a perfect square and is irrational
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Cold Boarders offers snowboard rentals for $5 per trip and an initial fee of
weqwewe [10]

Answer:

The prices will match up at 3 snowboard rental trips. The cost is $25.

Step-by-step explanation:

First, I wrote out the two equations:

Cold Boarders: 5x + 10

Ice Riders: 4x + 13

Next, I kept trying numbers for x until I found one that worked. The two companies prices match up at 3 snowboard rental trips. The cost will be $25. Hope this helped!

4 0
3 years ago
The cost of renting ice skates at a skating rink is $1.25. The rink charges $3.25 for each hour, x, of skating. Which graph best
posledela

Answer:

A

Step-by-step explanation:

Since the total cost at first will not be 5 exactly, it will turn to 4.5 (4.50). And it will be just below the five, at the first hour. And then from there, just add 3.25 each hour and forget about the 1.25 since 1.25 is used for the beginning only, and not the rest.

-By Shamaria Vaughn.

4 0
3 years ago
Read 2 more answers
I really need help ​
OLga [1]

Answer:

A and D

Step-by-step explanation:

Hope this helps!

4 0
3 years ago
Does anybody know the answer 4-10 ?¿ i need help !
Alika [10]

Answer:

#7 is 4.7

Step-by-step explanation:

Circumference is Pi x diameter

3 0
3 years ago
HELP PLEASE!
Doss [256]
D.
first, eliminate B and C, because the highest degree in these two equation is 3, a 3-degree equation has 3 roots, not 4. 

between A and D, A has the roots 0, 0, 7, and -7, all real roots.

D can be factored into (x²-49)(x²+1)=0
x²=49 or x²=-1
x=7 or -7, x=i or -i    two real roots, two unreal roots 

for the second equation: 
first, find the first term by using the formula:
the nth term=the first term + (n-1)*difference
you are given the 13th term and d=3.7
a13=a1+(13-1)d
1.9=a1+12*3.7
a1=-42.5

the sum of the first 13 terms is S=(a1+a13)*(13/2)=(-42.5+1.9)*6.5=-263.9
3 0
3 years ago
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